TY - GEN
T1 - Effect of crack closure on quantitative ECT inspection of closed fatigue cracks
AU - Chen, Zhenmao
AU - Yusa, Noritaka
AU - Miya, Kenzo
AU - Tokuma, Hideaki
PY - 2008
Y1 - 2008
N2 - In this paper, the feasibility to apply a closed fatigue crack as a substitute of a Stress Corrosion Crack (SCC) is investigated aiming at applications to ECT crack sizing. Several testpieces of closed fatigue cracks are fabricated, and ECT signals are measured after selected bending loads being applied to close the crack. From the measured signals, the crack profiles are reconstructed by using a deterministic inversion technique, and the sizing results are compared with the true crack profiles in order to evaluate the effect of crack closure. The results reveal that the closing load does not give significant influence on the crack sizing precision. Therefore, to simulate SCC with a fatigue crack closed by 3 point bending testing is not a suitable way from the view point of ECT inversion.
AB - In this paper, the feasibility to apply a closed fatigue crack as a substitute of a Stress Corrosion Crack (SCC) is investigated aiming at applications to ECT crack sizing. Several testpieces of closed fatigue cracks are fabricated, and ECT signals are measured after selected bending loads being applied to close the crack. From the measured signals, the crack profiles are reconstructed by using a deterministic inversion technique, and the sizing results are compared with the true crack profiles in order to evaluate the effect of crack closure. The results reveal that the closing load does not give significant influence on the crack sizing precision. Therefore, to simulate SCC with a fatigue crack closed by 3 point bending testing is not a suitable way from the view point of ECT inversion.
KW - Crack Closure
KW - Crack sizing
KW - Eddy Current Testing
KW - Fatigue crack
UR - http://www.scopus.com/inward/record.url?scp=84865426093&partnerID=8YFLogxK
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U2 - 10.3233/978-1-58603-896-0-171
DO - 10.3233/978-1-58603-896-0-171
M3 - Conference contribution
AN - SCOPUS:84865426093
SN - 9781586038960
T3 - Studies in Applied Electromagnetics and Mechanics
SP - 171
EP - 178
BT - Electromagnetic Nondestructive Evaluation (XI)
A2 - Tamburrino, Antonello
A2 - Melikhov, Yevgen
A2 - Chen, Zhenmao
A2 - Udpa, Lalita
ER -